.bann{
	position: relative;
	height: 500px;
}
.bann ul{
	width: 400%;
	position: absolute;
}
.bann ul li{
	position: relative;
	width: 25%;
	overflow: hidden;
	height: 500px;
	float: left;
}
.bann ul li a{
	position: absolute;
	width: 1920px;
	left: 50%;
	margin-left: -960px;
}
.bann ul li a img{
	display: block;
	width: 100%;
	height: 500px;
}
.banner_btn .prev{
	position: absolute;
	left: 0;
	width: 15%;
	display: block;
	height: 100%;
	top: 0;
	cursor: pointer;
	z-index: 10;
}
.banner_btn .next{
	position: absolute;
	right: 0;
	width: 15%;
	top: 0;
	display: block;
	height: 100%;
	cursor: pointer;
	z-index: 10;
}
.banner .hd{
	position: absolute;
	bottom: 20px;
	width: 100%;
	z-index: 10;
	text-align: center;
}
.product .hd{
	width: 100%;
	text-align: center;
}
.product{
	position: relative;
}
.product ul{
	overflow: hidden;
}
.product li{
	float: left;
}
.product li img{
	width: 100%;
	display: block;
}
.product .list{
	position: relative;
	overflow: hidden;
}
